‫عبدالله صالح حاج نافع‬2017-08-212017-08-212016http://hdl.handle.net/123456789/4856Abstract This experiment was conducted at the fish farm Faculty of Agricultural Technology and fish Science, El-Neelain University, in the period from 4/5/2015 t0 17/8/2015. To study and compare the effects of adding fish powder and chicken remnants in a feeding formula for (Oreochromis niloticus fingerlings)Nile Tilapia's fry , and to determine the level that achieves better growth, better economic of the addition. The experiment was carried out on 12-glass basin,with dimensions of (90 cm × 40 cm × 40 cm), and with four treatment (D, C, B, A) at a rate of three frequencies per treatment. the fish stocking rate was 30 fish / basin, with averaged weight (0.92, 0.96, .0.90, 0.90) g of the four treatments (D, C, B, A) respectively . It has been supplied with Oxygen pumping basins or 24 hours. The water basins renewed daily at a rate (10.5%) of the volume of water. Fish was fed with four diets, each containing 35% protein,with rate of (4-2) per day, with percentages (10 - 4%) body weight. The first treatment (Control) contained source of vegetable protein only, and the second treatment contained 12% fish meal, and the third treatment contained a mixture of fish meal and chicken manure at a rate of 6% each, the fourth treatment contained 12% of chicken remnants powder . Fish performance was evaluated during the experiment and at the end using criteria (weight gain, cm lengths, the daily qualitative and relative growth rate, feed conversion ratio, survival rate, and net meat). The statistical analysis showed there was significant differences between the averages of the fish weights in treatment (D and A), no significant differences between the averages of the rest of treatments and no significant differences between the fish lengths mean (total length and standard) in all treatments. It outperformed the two treatments (B and C) in the ratio of net meat on the fourth treatment D, and otherwise do not find significant differences between the treatments.Also there were no significant differences between the mean fish tissue ratios in a ll of the (moisture, dry matter, protein, and fat, and minerals) of all treatments. Treatment (D) recorded increase in the proportion of moral fiber in fish tissue more than treatments (B, C), respectively, but there were no significant differences between the treatments. The study concluded that it could be dispensed with entirely protein fish meal (12%) and rely on plant sources of protein in the feeding fry, and the addition of poultry remnants powder led to an improvement of the plant source of protein in the growth rate and the cost of food. And when taking into account the growth rate, and economic factors (cost of food, and the yield on the cost of food), it was found that the best treatment achieved better growth and economic returns recommended by the study is the fourth treatment, which contained 12% chicken remnants powder.Agriculture